Help for Opening folder into same istance of explorer

Hi,
now in my script using command "RUN" I open an istance of Explorer

Run("explorer.exe /e,c:\")

but i need that in some circumstance the folder is different,
but if i send new command with new folder:

Run("explorer.exe G:\NewFolder\Test")

new istance of explorer is opened and i don't want this.
How can i do to open new folder in the same istance of explorer that is
Active [  IF WinActive then....  ]

(i want that work similar ....as user click directly on folder panel of explorer)


Can someone give me a suggestion ??
Thanks